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How do we know that there can only be insignificant amounts of dark matter in our solar system?
Rate of Inflation
The measure of how the general level of prices for goods and services is rising, and, subsequently, how purchasing power is falling over time.
Nominal Interest Rate
The interest rate before adjustments for inflation, representing the raw rate of interest paid on savings or charged on loans.
Real Interest Rate
The rate of interest an investor expects to receive after allowing for inflation, representing the true cost of borrowing and the true yield on investing.
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